Hi, I'm trying to make a voice call with oFono. I'm using Option GlobeSurfer ICON 225 HSDPA/UMTS USB as the modem. If I understood correctly voice call should be possible with the dbus-messages used below. However, I end up with an error "Operation failed". $ dbus-send --system --print-reply --dest=org.ofono / org.ofono.at.Manager.Create string:"dev:/dev/ttyHS0" string:"at" method return sender=:1.540 -> dest=:1.544 reply_serial=2 object path "/modem1" $ dbus-send --system --print-reply --dest=org.ofono /modem1 org.ofono.VoiceCallManager.Dial string:"+000000000000" string:"default" Error org.ofono.Error.Failed: Operation failed When the second dbus-message is sent the following messages are printed by the ofonod: ofonod[19113]: atd_cb got result: 0 ofonod[19113]: Final response: ERROR ofonod[19113]: Dial callback returned error: (null) Are the messages I sent to the ofonod correct? Regards, Marko